standard waveguide

例句：

1. 1.The standard waveguide is used in the transmission of radio signals.
   标准波导用于无线电信号的传输。
2. 2.The design of the standard waveguide is crucial for the performance of the system.
   标准波导的设计对于系统的性能至关重要。
3. 3.The standard waveguide is a critical component in the construction of modern telecommunications networks.
   标准波导是现代电信网络建设中的关键组件。